Method and apparatus for detonation of distributed charges
Patent
·
OSTI ID:5119379
This paper describes a method of geophysical exploration wherein aseismic wave is passed through a bore hole so as to sequentially detonate of explosive charges disposed within the bore hole at spaced intervals, each of the charges being provided with an electrically-responsive detonator, and wherein each of the detonators if fired by the discharge of a charged capacitor associated therewith. It comprises: operatively connecting electronic switches to the capacitors so as to control the completion of the respective discharge circuits of the capacitors; preselecting a seismic wave magnitude; causing a seismic wave to successively strike electro-acoustic sensors connected respectively to the switches; comparing the seismic wave magnitude indicated by the sensors with the predetermined magnitude; and generating successive voltage pulses adapted to actuate the switches sequentially and discharge the capacitors when the seismic wave magnitude indicated by the sensors substantially equals the preselected magnitude.
- Assignee:
- NOV; EDB-91-158369; NOV-91-023008
- Patent Number(s):
- A; US 4991684
- Application Number:
- PPN: US 7-337958
- OSTI ID:
- 5119379
- Country of Publication:
- United States
- Language:
- English
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